XPS is XML Paper Specification. It is a specification for a page description language and a fixed-document format developed by Microsoft. It is an XAML-based specification, based on a new print path and a color-managed vector-based document format which supports device independence (documents look the same and as they are intended on any device) and resolution independence. It is essentially a competitor to PDF. XPS is a part of WPF which is a part of .NET 3.0.
To save a Word or Office document as XPS do Print to File.
PDF includes dynamic capabilities not supported by the XPS format.